Do you have a question about the AT&T Trimline 230 and is the answer not in the manual?
Instructions for filling out the directory card and storing numbers.
How to set the dial mode switch for correct dialing service.
Verifying the presence of a dial tone after setup.
Instructions for completing the directory card for wall mounting.
Setting the dial mode switch for wall-mounted configuration.
Confirming dial tone after wall installation.
Steps to resolve issues when no dial tone is present.
Troubleshooting problems with calls not dialing or dialing slowly.
Solutions for when the telephone ringer is not working.
General troubleshooting and contact information for further assistance.